Physics – Condensed Matter – Superconductivity
Scientific paper
2008-01-09
Phys. Rev. B 77, 134514 (2008)
Physics
Condensed Matter
Superconductivity
20 pages, 8 figures, 3 tables
Scientific paper
10.1103/PhysRevB.77.134514
Single crystals of RbOs2O6 have been grown from Rb2O and Os in sealed quartz ampoules. The crystal structure has been identified at room temperature as cubic with the lattice constant a = 10.1242(12) A. The anisotropy of the tetrahedral and octahedral networks is lower and the displacement parameters of alkali metal atoms are smaller than for KOs2O6, so the "rattling" of the alkali atoms in RbOs2O6 is less pronounced. Superconducting properties of RbOs2O6 in the mixed state have been well described within the London approach and the Ginzburg-Landau parameter kappa(0) = 31 has been derived from the reversible magnetization. This parameter is field dependent and changes at low temperatures from kappa = 22 (low fields) to kappa = 31 at H_{c2}. The thermodynamic critical field H_{c}(0) = 1.3 kOe and the superconducting gap 2delta/k_{B}T_{c} = 3.2 have been estimated. These results together with slightly different H_{c2}(T) dependence obtained for crystals and polycrystalline RbOs2O6 proof evidently that this compound is a weak-coupling BCS-type superconductor close to the dirty limit.
Bukowski Zbigniew
Karpinski Janusz
Rogacki Krzysztof
Schuck G.
Zhigadlo Nikolai D.
No associations
LandOfFree
Structural and Superconducting Properties of RbOs2O6 Single Crystals does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Structural and Superconducting Properties of RbOs2O6 Single Crystals, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Structural and Superconducting Properties of RbOs2O6 Single Crystals will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-669727